May weather forecast
Wyoming, USA

May signals the true onset of spring in Wyoming, bringing more hospitable conditions that lay the groundwork for the summer ahead. Average low temperatures climb further, ranging between 30°F (-1.1°C) and 40°F (4.4°C) depending on location and altitude. Snowfall becomes increasingly rare, particularly in the plains where it usually gives way to rain. The highlands may still experience some lingering snow, but accumulations are generally below 20" (508mm).

Relative to April, May presents a consistent warming pattern and extended daylight hours, both of which encourage outdoor activities. Winds, which have been a constant feature in Wyoming, mellow down in intensity but are still present. While the occurrence of Chinook winds becomes rarer, their absence is less felt due to the general increase in temperatures. The month also marks the onset of the usual precipitation period that extends into early summer, although Wyoming remains relatively dry with average rainfall rarely exceeding 10" (254mm). May serves as a prelude to the state's tourist season, as hiking trails start to open and the landscapes become more accessible. The month offers a welcoming break from the long, harsh winter and a gentle introduction to the warmer months.

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• Cheyenne - May »
  On the last day of the month, in Cheyenne, sunrise is at 5:29 am and sunset at 8:24 pm MDT. In Cheyenne, during May, the rain falls for 17.5 days and regularly aggregates up to 2.95" (75mm) of precipitation.
• Casper - May »
  The month with the most rainfall in Casper is May, when the rain falls for 14.1 days and typically aggregates up to 1.77" (45mm) of precipitation. On the last day of the month, in Casper sunrise is at 5:29 am and sunset at 8:36 pm MDT.
• Laramie - May »
  The month with the most rainfall in Laramie is May, when the rain falls for 15.1 days and typically aggregates up to 2.68" (68mm) of precipitation. In Laramie during May, snow falls for 7.4 days and regularly aggregates up to 6.69" (170mm) of snow.
• Gillette - May »
  On the last day of the month, in Gillette sunrise is at 5:21 am and sunset at 8:37 pm MDT. In Gillette during the entire year, snow falls for 50.5 days and aggregates up to 19.53" (496mm) of snow.
• Rock Springs - May »
  The month with the most rainfall in Rock Springs is May, when the rain falls for 13.8 days and typically aggregates up to 1.5" (38mm) of precipitation. The month with the most rainfall in Rock Springs is May, when the rain falls for 13.8 days and typically aggregates up to 1.5" (38mm) of precipitation.
• Sheridan - May »
  On the last day of the month, in Sheridan sunrise is at 5:25 am and sunset at 8:45 pm MDT. Throughout the year, in Sheridan, there are 78.9 snowfall days, and 46.3" (1176mm) of snow is accumulated.
• Green River - May »
  The month with the most rainfall in Green River is May, when the rain falls for 13.8 days and typically aggregates up to 1.5" (38mm) of precipitation. In Green River in May, during 13.8 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.
• Evanston - May »
  In Evanston in May, snow falls for 5.8 days, with typically accumulated 3.11" (79mm) of snow. In Evanston in May, snow falls for 5.8 days, with typically accumulated 3.11" (79mm) of snow.
• Riverton - May »
  In Riverton during the entire year, snow falls for 42.8 days and aggregates up to 25.47" (647mm) of snow. In May, in Riverton the rain falls for 9.9 days.
• Jackson - May »
  Throughout the year, in Jackson there are 173.6 snowfall days, and 181.26" (4604mm) of snow is accumulated. In Jackson, in May, during 15.7 snowfall days, 11.42" (290mm) of snow is typically accumulated.
• Cody - May »
  In Cody, in May, during 15.3 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. On the first day of May in Cody, Wyoming, sunrise is at 6:06 am and sunset at 8:20 pm.
• Rawlins - May »
  In Rawlins, during May, the rain falls for 11.7 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Rawlins, during May, the rain falls for 11.7 days and regularly aggregates up to 1.34" (34mm) of precipitation.